diff --git a/entity/Activity_entity/Activity_entity.aod b/entity/Activity_entity/Activity_entity.aod
index e9bde43d0414ae678882b9cca7a446e99876c53e..2f8b91974fb97d4e7baebbb894d1e886bb837d7d 100644
--- a/entity/Activity_entity/Activity_entity.aod
+++ b/entity/Activity_entity/Activity_entity.aod
@@ -50,7 +50,7 @@
       <title>Category</title>
       <consumer>KeywordCategories</consumer>
       <groupable v="true" />
-      <mandatory v="false" />
+      <mandatory v="true" />
       <displayValueProcess>%aditoprj%/entity/Activity_entity/entityfields/category/displayValueProcess.js</displayValueProcess>
     </entityField>
     <entityField>